Structural and dielectric properties of Mg-doped strontium titanate ceramics: Dependence on the materials, processing

resumo

The effect of materials processing on structural and low-frequency dielectric properties of SrTiO3 (ST) ceramics doped with MgO is studied in this work. Samples prepared with agate milling media show negligible solubility of MgO in ST. Instead, MgO was present in a SiO2 rich phase at the grain boundaries. For some compositions containing this phase, a dielectric permittivity peak was present at low temperatures associated with an extra Raman vibrational mode. In contrast, samples prepared with teflon pots and ZrO2 media exhibit a higher solid solubility limit of Mg in ST, absence of second phase at the grain boundaries and no dielectric anomaly at low temperatures for the same batched compositions.

palavras-chave

SRTIO3; SPECTROSCOPY

categoria

Materials Science

autores

Tkach, A; Vilarinho, PM; Kholkin, A; Reaney, IM; Petzelt, J

nossos autores

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".